Blank-scarfing machine



Aug. 6, 1 929. Q HORVATH 1,723,783

BLQNK SCARFING MACHINE Filed July 27, 1923 6 Sheets-Sheet l 61H0: n mi).

Aug. 6, 1929.

G. HORVATH 1,723,783 y BLANK SCARFING MACHINE Filed July 27, 1925 6Sheets-Sheet 2 S l* w. wm .il-- -x' m b mm x fll u@ ai Mfg'- Aug. 6,1929. v G. HORVATH 1,723,783

BLANK SCARFIG `MACHINE Filed July 27, 1925 6 Sheets-Sheet 3 Aug. 6,1929.

BLANK scARFING MACHINE Filed July 27. 1923 6 Sheets-Sheet 4 gunman/(ofc:

G. HoRvATH f 1,723,783

I Aug. 6, 1929. G. HoRvATH BLANK scmmm- MACHINE 6 Sheets-Sheet FiledJuly 27, 1925 S11/manioc @H701 n una Aug- 6, 1929- G. HoRvATH 1,723,783

BLANK SCARFING MACHINE Filed July 27, 1925 e'sheets-sheen 6 gwn/anionegal/MM .4 @M

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Patented Aug. 6, 19%).

UNITED STATES GFZA HORVATH, F DETROIT, MICHIGAN.

BLANK-SCARFING MAHINE.

Application filed July 27,

In the manufacture oi milk cans, ice cream containers and other largemilk receptacles, metallic sheets are rolled or otherwise formed toprovide a can or receptacle body shell and in order that the edges ofthe metallic sheet may be joined to form a tight durable seam, it ispreferable to provide a metallic sheet with scarted or beveled edgeswhich may be placed in an adjoining relation and welded, brazed orotherwise connected to form a non-l-eakable connection just as thoughthe cylindrical body or shell were drawn or integral throughout. Thescart joint formed by connecting the edges of the metallicsheet is incontradistinction toloutt joints, lap joints or others producing seamsthat interrupt the cylindrical inner and outer surfaces ot a receptaclebody or shell.

My invention aims to provide a scarling machine by which can orreceptacle body blanks may beexpeditiously and economically operatedupon to bevel or scoop out edges of the blank, and a machine inaccordance with my invention includes a novel clamping mechanism andgauge by which blanks ot various sizes may be positively held during thescarfing operation. The n'iachine also includes a rotary cutter and anovel operating mechanism by which the cutter is' brought into operationin timed relation to the clamping mechanism, consequently there is nodanger of a blank being operated upon unless firmly held in the machine.

My invention may be considered as including a machine body and anadjustable work gauge; a work clamping mechanism, an operating clamp,and a rotary cutter. These organizations are combined into a machinethat is compact, easy to control and highly etlicient tor the purposestor which it is intended. Each organization will be hereinafterspecifically described under dillerent captions and reference will nowbe had to the drawings, wherein j Figure l is an elevation of the rearside of the machine;

Fig. 2 is a vertical cross sectional view ot a portion of the clampoperating mechanism;

Fig. 3 is an elevation of the front side of the machine;

Fig. 4 is a vertical cross sectional view of a portion of the workclamping mechamechanism tor the Work 1923. SClial No. 654,119.

nism taken on the line IV--IV of Fig. 3;

Fig. 5 is an end view of the machine partly in section;

Fig.V 6 is a vertical cross sectional view of the machine taken on theline Vl- Vl of Fig. l;

Fig. 7 is a plan of the machine partly broken away;

Fig. 8 is an enlarged end view of the operating mechanism for the workclamp;

Fig. 9 is a longitudinal sectional view ot the same taken on the lineIX-IX of Fig. 8;

Fig. 10 is' a. horizontal sectional view ot the same taken on the lineEli- X ot Fig. 8;

Fig. ll is adetail sectional view taken on the line Xl--Xl of Fig. 9;

F l2 is a fragmentary sectional view of a portion of the machineillustrating the rotary cutter and clamp relative to a blank;

Fig. 13 is a perspective view ot a portion of the clamp and a guidetherefor,

Figs. ltand l5 are perspective views ci' a roller adjusting device; and

Fig. 16 is a cross sectional view of a portion of a can showing themeeting edges ot a blank prior to being united.

lilac/line body and adjustable iii-m17.: gauge. (Figs. l, 3, 6 and 7).

In the drawings, the reference numerals l and 2 denote end or supportstor an oblong hollow machine body comprising a front wall 3, a rear wallil, a top wall or table 5 and end walls 6 and 7. The top wall or table 5is adapted to support` a blank or sheet of metal 8 adapted to have anedge thereof s heared or cut at the rear edge of the table, and -torthis purpose the rear wall d is provided with a shoulder or seat 9 onwhich is mounted a wear plate l0 ot more indurate metal than the body otthe .machine The wear plate l0 may be held in place by screws l1 orother fastening means.

ln order to properly position the blank 8 on the table 5 relative to thewear plate l0, an adj ustable gauge is employed.' The front and rearwalls 3 and. Llof the machine body are provided with openings orbearings 12 fora set of feed screws 13 provided with nuts or collars lllabutting the bearings l2 of the machine body. The trent ends ot the feedscrews ll are connected by an auxiliary table or support 1.5 which hasits blank supporting surface in the saine hoiizontal plane as the top ofthe table 5. nttached to the front edge of the auxiliary vtable l5 is aledge strip 16 against which Vpermit of blanks of various sizes beingplaced on the tables to have edges of the blank scarfed and prepared foruniting When the blank is bent to cylindrical form or suchAconfiguration as Will bring the scarfed edges of the blank together.

lfVofr/c clamp mechanism. (Figs. 1, 3, d, 6, 12 and The machine body, atthe ends of the table 5,y is provided With sots of bearings 17 andmounted over said bearings and secured thereto is a longitudinallydisposed throat inembervor bridge piece 18 co-operating with the table 5in forming a Window 19. Fixed to the front side ofthe throat member 1Sare hangers 20 which extend into the Windovv 19 and have the lower endsthereof provided with vertically disposed guides 21 for the rectangularframes 22 of a clamping bar or member 23 which is adapted to be loweredon to the blank 8 to firmly clamp said .blank on the table 5 While beingoperated upon. The hanger guides 21 extend into the frames 22 and saidframes are retained on the guides, against accidental displacement,

by retaining plates 24 having guide portions 25 which meet the guides 21Within the frames 22. The guides 21 and 25 are connected by screws 26 orother fastening means. lVith the frames 22 of the clamp member slidablerelative to the hangers 20, the cl amp member can be raised and loweredrelative to the blank 8 or the piece of Work on the table 5, and theraising and lowering of the clamp member is preferably in timed relationto the cutting or shearing of the edge of the blank 8, so that saidblank Will be positively held before the rotary cutter of the machine isbrought into operation. lt is only necessary for the attendant of the.machine to see that the blank is properly placed on the tables, thenthere will be no danger of the blank being displaced during the cuttingor shearing operation.

Operating mechanism for worin damp. (Figs. 2, 3, 5, and 8 to 12inclusive). Alining Withthe bearings 17 of the inachine body arebearings 27 of the hangers 2O andjournaled in the bearings 17 and 27 visa longitudinally disposed power shaft which has one end. thereofprovided with a small gear Wheel 29 and a Worin wheel 30.

1his end of the power shaft protrudes beyond the wall 7 of the machinebody and is additionally supported by a. bracket 3l attached to the endWall 7 of the machine body. for a worm ii'ieshing with the worin wheel30. One end of the worin has a chain wheel 3l so that said worin may bedriven by a chain from the armature shaft 3G of an electric motor 37 atone end of the machine, said n'iotoi being preferably supported frointhe legs 1, as best shown in Figs. 1 and 3. It is obvious that the motor37 may be located so that its armature shaft 3G niay be directly coupledto the Worin 33, or as a matter of fact any suitable source of power maybe employed for driving the povver shaft 2S.

@n that end of the power shaft 2S, adjacent tlie end wall G of JIhemachine body, a small gear Wheel 38, meshing with a large. gear Wheel 39having its hub portion d() loose on the hub del of a pawl membri' #l2which is lined on a stub shaft AlI-l mounted in a bearing del of the endwall G. The paivl member Ll2 is somewhat like a double crank or crosshead and has its end portions provided with sockets Ll5 'for pivoter]spring pressed pan'ls 4G. Only one pawl is used at a time but tvosockets are provided so that either may be used should it be necessaryto renew a panl. 'lhe pawl shown in Fig. S is held in a normallyextended po sition by the expansive force a spring 17 mounted in apocket 18 of the paivl member 4t2. The outer end of the parat lo isndapted to engage a ratchet ring or member 1-E) mounted the face of thelarge gear wheel and reiained therein by sere 's 50 or other fasteningmeans.

Keyed or otherwise i'ixed on the hub portion l1 of the pawl member Ll2is the hub 5l of a gear wheel 52 and said gear wheel meshes with anothergear wheel 53 mounted on the end of a` lo gindinally disposed shaft 511,jouinaled in bearings 55, carried by the rear wall of the machine body.Sec Fig. 1.

On the outer faces of the gear wheels 52 and 53 are wrist pins 56 and.57 provided with anti-frictional rollers 5S and these rollers areadapted to engage and actuale a rocker member 59 on a stub shaft (30carried by a casing 61 fastened to the end wall 6 of the machine body.The casing (i may have a spider frame G2 attached to the und wall (l byl ilts 63 or other 'fastening means. As shown in Fig. 8 the casing (5lis of such configuration as 'to enclose the gear wheels' 3S. 29, n2y 55Eand associated parts.

The rocker member 59 extends through an opening 6-1 in the 4asing G1 andis pivotally connected, as at to an extensible rod 6G which may beprovided with a 'turn buckle oi" other adjustable device G7 by On thebracket 3l is a housing 32 llll General operation.

l will assume that the power shaft 28 is being driven and that theauxiliary table l5 is properly set so that when the blank 8 is placed onthe main table 5 the edge of the blank Will be presented at the Wearplate l0 to be trimmed or cut to provide the blank with a beveled orconcaved edge.

The power shaft 28 drives the large gear Wheel 39 and as this gear Wheelrevolves in a clockwise direction, viewing Fig. 8, it rotates the paivlmember 42 by virtue of the pawl 46 engaging the ratchet ring 49. liliththe paWl member 42 rotating in a clockwise direction, as indicated byarrouT on F ig. 8, the shaft 43 is driven, the gear wheel 52 thereon,and the gear Wheel 53 ot' the shaft 54. As this shaft 54 is providedWith cams 101 it is obvious that the tiltable members Will be tilted toraise and lovver the rotary cutter relative to the blank. During suchmovement of the tiltable members 85 the rotary cutter is driven trom thepower shaft 28 through the gear wheels 29 and 88.

As the gear Wheels 52 and 53 are revolved the anti-irictional rollers oithe Wrist pins 56 and 57 engage the rocker member 59 causing said memberto rock the shaft 69 and raise and lower the clamping bar or member 23relative to the blank 8. The constructive arrai'igement of parts is suchthat the action ot theclamp mechanism is timed to firmly hold the blankon the table While the rotary cutter is shifted into and out otengagement with the edge of the blank. The blank is clamped throughoutits width so that it cannot be dragged over the table 5 during theaction of the rotary cutter, and immediately upon the edge of the blankhaving been operated upon and the rotary cutter raised the blank 8 isreleased by the clamp member 23 and another blank may be placed inposition or the blank reversed in order that its opposite edge may becut.

As the large gear Wheel 39 is driven in a clockwise direction, carryingwith it the pawl member 42, the paivl 46 oi said member eventuallyimpinges against the plunger 7G and said pawl rides over the plunger andis raised out from engagement With the ratchet ring 49. As this ring iscarried by the driven gear Wheel 39, the application of power to thesha't't 43 ceases and consequently the tiliiable `members 85 are notactuated nor is the clamping bar or member rllhe pawl 46 is otsutlicient length to rest on the plunger 7G Without any overrunningaction of the pavvl member 42, and this will be the condition oit themachine as long as the paivl 4G is retracted. It is during such interimthat an attendant ot the machine may remove a blank, reverse it, orsubstitute another blank therefor. lt then becomes necessary for theattendant of the machine, after properly placing the blank, to shift thehandle or crank 82 1which rocks the rod 81 and causes the rack andpinion to retract the plunger 76. llVhen this plunger is retracted thepawl 46 immediately engages the driven ratchet ring 49 and the machineis placed in action to cut the edge of the blanl The attendant ot themachine may strike the lever 82 and cause the plunger 7G to be retractedto release the paivl 46, but when the handle or crank 82 is released orrecovers from a blow the plunger 76 assumes an extended positionAtoagain be Within the path oil' the pawl 46 and cause a cessa-tion inthe operation of the clamping mechanism as Well as the tilting action otthe rotary cutter at a proper time.

lVith the rotary cutter constantly driven its active position is underthe control et the machine attendant, and since the clumping mechanismis automatically actuated, in timed relation to the action ot the rotarycutter, there can be no cutting action unless the blank is properlyclamped on the table. This is a saiety factor in connection with themachine and since the rotary cutter is at the rear side of the machinean attendant can safely manipulate blanks at the front side ot themachine.

It is thought that the operation and utility of my machine Will beapparent Without further description, and While in the drawings, thereis illustrated a preferred embodment of my invention, it is to beunderstood that the structural elements are susceptible to suchvariations and modifications as tall Within the scope of the appendedclaims. l

l. A machine tor cutting edges of a metal! lic blank preparatory toforming a body having a scarf-joint, said machine comprising a table onwhich the blank is placed, a tiltably supported driven rotarf cutteradapted to operate on the blank on said table, clamping means adapted tohold the blank on the table, a set of meshing gears, cutter tiltingmeans operated by one ot' said gears and adapted to intermittentlyactuate said tiltable members, clamp actuating means adapted to beoperated by said gears to intermittently actuate said clampiu means, apavvl member nism with said carried by said able with one oit saidgears, and manually controlled means operatable in the path ot said pawlto control the driving of said gears so as to time the tilting ot saidcutter relative to said clamping means.

2. A machine as called for in claim l, wherein said cutter tilting meansincludes (Y i r w driven 1n synchrodriven rotary cutter, a pawl pawlmember and engagesaid meshing gears to drive CII llO

y ing 77. i

the machine body.

83 carried by the auxiliary table 15.

-whieh the rod 66 may have its longitudinal dimension increased ordecreased to regulate the stroke or action of a member actuated by saidrod. The upper end of the rod 66 is pivotally connected to a crank 68 ona longitudinal rock shaft 69, journaled in a bearing 70 at one end ofthe throat member 18 and bearings 71 in the window 19 of said-throatmember. On the rock shaft 69, at each of the bearings 71, is a crank 72and said cranks'are pivotally connected to the upper ends of extensiblerods 73 which have the lower ends thereof pivotally connected tostirrups 74 attached to the upper edge of the clamp bar or member 23.This clamp bar or member 23 has enlarged apertured portions 75 toreceive the sti rups. ee

Figs. 12 and 13.

The pawl 46 is adapted to establish a rdriving relation between theratchet ring L49 and the pawl member 42,v but at times such drivingrelation is interrupted by the pawl 46 being lifted out of engagementwith the ratchet ring 49. Such disconnection 1s Y accomplished `by thereduced end of a spring` pressed plunger 76 mounted in a casing 7 7supported from the end wall 6 of the machine body. The plunger 76 isformed with a rack 78 meshing with a pinion 79 journaled in a housing 8Oclamped about a cas- Sliding through the pinion 79 is a -rod 81, otherthan cylindrical in cross section, saidrod also sliding in openingsprovided therefor in the walls 3 and 4 of The front end of the rod has acrank or handle S2 with the hub portion of said crank journaled in abracket 1f the auxiliary table 15 is adiusted relative to the front wall3 the rod 81 slides in the pinion 79, but at all times maintains anoperative relation with the pinion 7 9 so that the plunger 76 mayberetracted against the action of an expansive spring 84 mounted in thecasing 77. The plunger may be manually retracted but is normally held inextended position with its reduced end in the path of .the pawl 46 toraise said pawl from engagement with the ratchet ring 49.

l R01/arg critter.

(rigs. e, i and ie). Loose on the power shaft 28, between the bearings17 of the machine body, are the front ends vof tiltable members 85provided with bearings 86 for a cutter shaft S7. At

.one endA of said cutter shaft is a large gear wheel 88 meshing with thesmall gear wheel .29 of the power shaft 28, said gear wheels constantlymeshing even though the members 85 are tilted or adjusted rela-tive tosaid power shaft. A

Fixed on the cutter shaft 87 is the hub portion 88a of a cutter bodyhaving spiral ribs or holders 89 extending throughout the length thereofand provided with seats 90 for spiral blades 91 which are retained inplace by interposed segment shaped blocks 92 attached to the hub portion88 of the rotary cutter by screw bolts 93. T he blocks 92 brace theblades 91 and during the cutting action of said blades they are backedup by the spiral ribs or supports 89 forming the cutter body. The blades91 are somewhat similar to the blades of a lawn mower and will have ashearing action against the edge of the blank S on thel wear plate 10,said blades scooping out the blank so as to leave a beveled edge 94 thatis somewhat concave. lVhen two such edges are brought together7 as shownin Fig. 16, a small space exists between such edges and this space isconducive to proper welding of the two edges. Each edge of the blankwhen properly cut or scooped out will present two contacting edges 95,not contacting with each other but adapted to contact with similar edgesat the opposite edge or end of the blank, when said blank is formed toprovide a can or receptacle body. -When welding irons or electrodes arebrought to bear on the adjoining edges of the blank the metal issutliciently upsetto positively unite the contacting edges of the blankand the space 94 between such edges is wiped out by the upsetting of themetal and a very intim'ate7 if not integral, relation establishedbetween the edges of the blank.

The spiral cutting blades 91 prevent the formation of fins or raggededges on the blank, since there can be no tearing or sudden cuttingaction as though the full width of the blank were c ut at one time. litha cutting blade starting in at on e side of the blank it will graduallycut to the opposite side thereof and cooperating therewith will beadjacent blades all contributing 'to a clean and uniformly cutedge, twoof which may form a. perfect scarf joint.

The rotary cutter is adapted to be raised and lowered relative to thewear plate 10 of the table 5. For this purpose the tiltable members 85are provided with adjustable shafts or rotary members 96 and on theouter ends of said shafts or members are micrometer gauges 97 andclamping nuts 98. On the inner ends of said shafts or members areeccentric heads 99 provided with anti-frictional rollers 109 and theserollers normally engage cams 101 on the shaft 54. By turning the shaftsor members 96 and locking the same in adjusted positions the tiltingaction of the rotary cutter may be regulated. As the cutting blades 91are worn the anti-frictional rollers 199 may be adjusted to lower therotary cutter relative to the table and thus insure proper action of thecutting blades relative to the blank 8.

a shaft supporting one o said gear Wheels and driven thereby, and a camon said sha'l't to efect tilting` oiE the tiltable members of saidcutter.

3. A machine as called igor in claim l, wherein said clamp actuatingmeans includes a rocker member articulated with a blank clamping member.

l. A machine as called for in claim l, wherein said manually controlledmeans includes a normally distended plunger, and rack and pinions forretraeting` said plunger. A 5. In a machine for cutting the edge of ablank wherein the blank is held stationary While a cutter is moved intoand out of engagement with the blank, blank holdingmeans, said meanscomprising a reciprocable member brought down into engage` ment with theblank, a rock shaft adapted to reciprocate said member, a rock memberadapted to rock said rock shaft, meshing gear Wheels adapted to actuatesaid rocker member, and driven means housed Within one oi said gearWheels adapted to inter mittently operate said gear Wheels.

G. A machine as called for in claim 5, wherein said driven meansincludes a ratchet member Within the gear Wheel, a driven pawl member,and a payvl carried by said member adapted to be moved into and out ofengagement with said ratchet member.

ln testimony Whereoil I aiiix my signature.

GEZA HORVATH.

